Add-onvB 3.8 To xF integration?

Active member

I have a friend who owns a vB forum, and I own a xF forum. We might join our forums together, but that would mean one of us converting to another software to possibly use bridging plugins, and neither of us can afford a new license.

Is it possible to sync the users among both forums with vB 3.8.7 and xF 1.2.2?